(现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学), ),吉林,吉林,132012
纸质出版:2026
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金国彬,张皓然,杨明城,李 玲,党若峰,蒙昌鑫.改进构网型换流器在新能源场站中的中高频振荡抑制策略[J].智慧电力,2026,54(3):65-74.
doi:10.20204/j.sp.2026.03008
金国彬,张皓然,杨明城,李 玲,党若峰,蒙昌鑫.改进构网型换流器在新能源场站中的中高频振荡抑制策略[J].智慧电力,2026,54(3):65-74. DOI: 10.20204/j.sp.2026.03008.
doi:10.20204/j.sp.2026.03008 DOI:
针对新能源场站中的中高频振荡问题,提出了一种改进的构网型换流器控制策略。首先,基于谐波线性化方法建立该换流器的序阻抗模型,并分析主电路参数与控制参数对换流器中高频阻抗特性的影响。其次,采用分散稳定性判据对系统稳定性进行分析,降低了传统稳定性分析的保守性与计算复杂度。再次,将所提改进型构网型换流器应用于构网型变流器占比低的系统场景,与传统的虚拟同步发电机相比,其在抑制系统中高频振荡方面表现更优。最后,通过实时数字仿真软件对所提方法及分析结果的有效性与正确性进行了验证。
To address the issue of medium/high-frequency oscillations in renewable energy stations
an improved control strategy for grid-forming converters is proposed. First
based on the harmonic linearization method
the sequence impedance model of the converter is established
and the influence of main circuit parameters and control parameters on the medium/high-frequency impedance characteristics of the converter is analyzed. Second
the decentralized stability criterion is applied to analyze system stability
reducing the conservatism and computational complexity of traditional stability analysis. Furthermore
the proposed improved grid-forming converter is applied to systems with a low proportion of grid-forming converters. Compared with traditional virtual synchronous generators
it demonstrates superior performance in suppressing medium/high-frequency oscillations. Finally
the effectiveness and correctness of the proposed method and analysis results are validated using real-time digital simulation software.
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